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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
037b60f2 MP |
2 | /* |
3 | * Broadcom BCM590xx PMU | |
4 | * | |
5 | * Copyright 2014 Linaro Limited | |
6 | * Author: Matt Porter <mporter@linaro.org> | |
037b60f2 MP |
7 | */ |
8 | ||
9 | #include <linux/err.h> | |
10 | #include <linux/i2c.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/mfd/bcm590xx.h> | |
13 | #include <linux/mfd/core.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/of.h> | |
17 | #include <linux/of_device.h> | |
18 | #include <linux/regmap.h> | |
19 | #include <linux/slab.h> | |
20 | ||
21 | static const struct mfd_cell bcm590xx_devs[] = { | |
22 | { | |
23 | .name = "bcm590xx-vregs", | |
24 | }, | |
25 | }; | |
26 | ||
9e1e7263 | 27 | static const struct regmap_config bcm590xx_regmap_config_pri = { |
037b60f2 MP |
28 | .reg_bits = 8, |
29 | .val_bits = 8, | |
9e1e7263 | 30 | .max_register = BCM590XX_MAX_REGISTER_PRI, |
037b60f2 MP |
31 | .cache_type = REGCACHE_RBTREE, |
32 | }; | |
33 | ||
9e1e7263 MP |
34 | static const struct regmap_config bcm590xx_regmap_config_sec = { |
35 | .reg_bits = 8, | |
36 | .val_bits = 8, | |
37 | .max_register = BCM590XX_MAX_REGISTER_SEC, | |
38 | .cache_type = REGCACHE_RBTREE, | |
39 | }; | |
40 | ||
41 | static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri, | |
037b60f2 MP |
42 | const struct i2c_device_id *id) |
43 | { | |
44 | struct bcm590xx *bcm590xx; | |
45 | int ret; | |
46 | ||
9e1e7263 | 47 | bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); |
037b60f2 MP |
48 | if (!bcm590xx) |
49 | return -ENOMEM; | |
50 | ||
9e1e7263 MP |
51 | i2c_set_clientdata(i2c_pri, bcm590xx); |
52 | bcm590xx->dev = &i2c_pri->dev; | |
53 | bcm590xx->i2c_pri = i2c_pri; | |
037b60f2 | 54 | |
9e1e7263 MP |
55 | bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri, |
56 | &bcm590xx_regmap_config_pri); | |
57 | if (IS_ERR(bcm590xx->regmap_pri)) { | |
58 | ret = PTR_ERR(bcm590xx->regmap_pri); | |
59 | dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret); | |
037b60f2 MP |
60 | return ret; |
61 | } | |
62 | ||
9e1e7263 MP |
63 | /* Secondary I2C slave address is the base address with A(2) asserted */ |
64 | bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter, | |
65 | i2c_pri->addr | BIT(2)); | |
794550ff | 66 | if (!bcm590xx->i2c_sec) { |
9e1e7263 MP |
67 | dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); |
68 | return -ENODEV; | |
69 | } | |
70 | i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); | |
71 | ||
72 | bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec, | |
73 | &bcm590xx_regmap_config_sec); | |
74 | if (IS_ERR(bcm590xx->regmap_sec)) { | |
75 | ret = PTR_ERR(bcm590xx->regmap_sec); | |
76 | dev_err(&bcm590xx->i2c_sec->dev, | |
77 | "secondary regmap init failed: %d\n", ret); | |
78 | goto err; | |
79 | } | |
80 | ||
9148f2c0 LD |
81 | ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, |
82 | ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); | |
9e1e7263 MP |
83 | if (ret < 0) { |
84 | dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret); | |
85 | goto err; | |
86 | } | |
87 | ||
88 | return 0; | |
037b60f2 | 89 | |
9e1e7263 MP |
90 | err: |
91 | i2c_unregister_device(bcm590xx->i2c_sec); | |
037b60f2 MP |
92 | return ret; |
93 | } | |
94 | ||
95 | static const struct of_device_id bcm590xx_of_match[] = { | |
96 | { .compatible = "brcm,bcm59056" }, | |
97 | { } | |
98 | }; | |
3827c510 | 99 | MODULE_DEVICE_TABLE(of, bcm590xx_of_match); |
037b60f2 MP |
100 | |
101 | static const struct i2c_device_id bcm590xx_i2c_id[] = { | |
102 | { "bcm59056" }, | |
103 | { } | |
104 | }; | |
105 | MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id); | |
106 | ||
107 | static struct i2c_driver bcm590xx_i2c_driver = { | |
108 | .driver = { | |
109 | .name = "bcm590xx", | |
037b60f2 MP |
110 | .of_match_table = of_match_ptr(bcm590xx_of_match), |
111 | }, | |
112 | .probe = bcm590xx_i2c_probe, | |
113 | .id_table = bcm590xx_i2c_id, | |
114 | }; | |
115 | module_i2c_driver(bcm590xx_i2c_driver); | |
116 | ||
117 | MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); | |
118 | MODULE_DESCRIPTION("BCM590xx multi-function driver"); | |
119 | MODULE_LICENSE("GPL v2"); |